Access Points not registering with WLC

[deepakdubbas]

Access points are not able to join to WLC from a specific location, but where as same model of AP's are registered and are working,

WLC model -- AIR-CT5508-K9

AP Model--AIR-AP1252AG-A-K9

WLC IOS version -- 8.0.135.0

 we have 5 to 8 No's on same model AP's none of them are working, we tried resetting, erasing the files from flash, configuring Manually. but Registeration is not happening. similar models are available at other locations which are registed with this same WLC, but we are experiencing the issue with only specific location

But Ap's are pinging from WLC and from APconsole we can ping WLC IP address.

Please suggest a way forward

Thank you.

[Leo Laohoo · Accepted solution]

FN63942 - Wireless Lightweight Access Points and WLAN Controllers Fail to Create CAPWAP Connections Due to Certificate Expiration

Roll back the year to around 2020 and reboot the APs.

[deepakdubbas]

ThanK you Leo, Let me try the suggested work around steps, will keep posted as we implement the changes.

Thanks again for this info.

[Rich R]

Note that for a permanent resolution to the issue you need to follow all the steps in the field notice including configuring:
config ap cert-expiry-ignore {mic|ssc} enable